Icelandite
Sign in to saveIcelandite is a type of volcanic rock, an andesite that is enriched in iron but deficient in aluminium (2) content greater than 60%.
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Icelandite is a type of volcanic rock, an andesite that is enriched in iron but deficient in aluminium (2) content greater than 60%.
thumb|upright=1.35| Icelandite is field O2 in the TAS classification.
Excerpted from Wikipedia’s “Icelandite” article, available under the CC BY-SA 4.0 licence.